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Quick Pressure Relief Control Valve

Hydraulic Control Valves

The Quick Pressure Relief Control Valve is the safety control valve designed to protect system by releasing pressure surges to atmosphere quickly caused from sudden changes in water speed because pumps put into/out of service frequently in water network elevation lines. When network pressure goes beyond set point, valve opens by itself quickly and protects system by releasing over pressure. When line pressure decreases to normal level, it is closed slowly and automatically as wholly sealed without causing surge.

Existing Diameters According To Their Connections

  • Flanged: DN50, … , DN300
  • Angled: 2″, DN50, DN80, DN100, DN150
  • Threaded : 3/4″, 1″, 1¼”, 1½”, 2″, 2½”, 3″
  • Victaulic : 2″, 3″, 4″, 6″
Quick Pressure Relief Control Valve - Catalog
Operating Pressure
 Standart 0,7 – 16 bar (10 – 240 psi)
Low Pressure Range 0,5 – 10 bar (7,5 – 160 psi)
High Pressure Range 0,7 – 25 bar (10 – 360 psi)
Temperature
 Min. Operating Temperature -10 °C (14 °F) DIN 2401/2
Max. Operating Temperature 80 °C (176 °F) DIN 2401/2
Port
 Flanged DIN 2501, ISO 7005 – 2
Threaded ISO (BSP) , ANSI (NPT)
Coating
 Standard Epoxy
Optional Polyester
Hydraulic Links
 Standard Reinforced Nylon (Air Brake))
Hydraulic pipe SAE J 844
Optional Copper DIN 1057
Actuator Type
 Single-Control Housing | Aperture Actuator, Aperture Off

Automatic control valves are used to perform the required operations as hydraulic with line pressure without the need for energy sources in the network line.

Valve Closing Mode

When the water pressure reaches the diaphragm, the water creates hydraulic force. This hydraulic force diaphragm, combined with the force applied by the spring creates a complete seal and allows it to close.

Valve Opening Mode

When the pilot on the main control valve in the closed position is placed in the evacuation position, pressurized water on the diaphragm of the main control valve is discharged. When the line pressure reaches the position to overcome the spring force, it applies hydraulic force from the bottom to the diaphragm of the control valve and allows the valve to reach the full open position

Modulation Mode

They are pilots connected to the control valve which enables the main valve to operate in this position. According to the amount of flow and pressure required to be adjusted, it controls the water pressure on the diaphragm continuously and allows it to operate in modulated position.

  • Easy operation and maintenance with simple structure
  • Low cost
  • Working at wide pressure value range
  • Perfect modulation even at low flow rates
  • Continuous on / off with flexible aperture
  • Full seal with reinforced diaphragm and inner spring
  • Long life with epoxy-polyester coating
  • Wide range of control area with the use of different pilot valves
  • Ability to work in horizontal and vertical positions in application areas
inch
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inch
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mm
inch
mm
Valve Diameter
 2 50 2½ 65 3 80 4 100 5 125 6 150 8 200 10 250 12 300
CV m³/h @ 1 bar
 88 88 174 187 187 419 1139 1698 2276
Kv gpm @ 1 bar
 102 102 201 216 216 484 1316 1961 2629

KV: Valve flow Coefficient (Flow Rate At 1 Bar Pressure Loss M³/h @ 1 BAR)

CV: Valve flow Coefficient (Flow in pressure lossof 1 Psi GPM @ 1 Psi)

Q: Flow (M³/h, GPM)

ΔP: Pressure Loss (BAR, PSİ)

G: Specific Gravity of Water (For water = 1.0)

Installation
  • After connecting to the valve Inlet, finger filter number 3 and mini ball valve number 2, connection to the “I” outlet of the pressure stabilizer pilot is provided with copper or plastic pipe.
  • The “II” output of the metal pilot is entered to the valve cover with the necessary connection elements.
  • Valve output is connected to mini ball valve No. 2/1. Connection to the “III” output of the metal pilot is provided from here. Finally, the other output of the Te connection element is connected to the manometer.
  • Valve rated diameter should be the same or a small rated diameter as the line diameter.
  • In the direction of the arrow indicated on the valve Mount.
  • Isolation valves (butterfly or sliding valve etc.) in the line Assembly of the valve.B) it is recommended to use air discharge valve, quick pressure discharge control valve (QR) and dirt retaining valves.
  • Cavitation risk during pressure drop is dangerous for valve body. Adjust the output pressure value you want to adjust by looking at the cavitation chart or contact our company.
Adjusting
  • Start the pump or open the main valve in the network to supply water to the system.
  • Wait a few seconds for the water to reach the control chamber of the valve.
  • When you turn the adjustment bolt “5” clockwise, the setting pressure value will increase and decrease when you rotate it in the opposite direction.
  • After adjusting the desired inlet pressure value, tighten the nut under the adjusting screw.
  • Check and clean the finger filter indicated by “2” according to the quality of the water. Do not clean the filter more than once in a few months unless the water is very dirty.
  • Evacuate water from the actuator and pilot valves of valves not used in winter.
  1. Quick Pressure Relief Pilot
  2. Mini Ball Valve
  3. Finger Filter
  4. Manometre
  5. Pressure Adjustment Bolt
Installation
  • After connecting to the valve Inlet, finger filter number 3 and mini ball valve number 2, connection to the “I” outlet of the pressure stabilizer pilot is provided with copper or plastic pipe.
  • The “II” output of the metal pilot is entered to the valve cover with the necessary connection elements.
  • Valve output is connected to mini ball valve No. 2/1. Connection to the “III” output of the metal pilot is provided from here. Finally, the other output of the Te connection element is connected to the manometer.
  • Valve rated diameter should be the same or a small rated diameter as the line diameter.
  • In the direction of the arrow indicated on the valve Mount.
  • Isolation valves (butterfly or sliding valve etc.) in the line Assembly of the valve.B) it is recommended to use air discharge valve, quick pressure discharge control valve (QR) and dirt retaining valves.
  • Cavitation risk during pressure drop is dangerous for valve body. Adjust the output pressure value you want to adjust by looking at the cavitation chart or contact our company.
Adjusting
  • Turn on the pump or turn on the mains main valve and give water to the system.
  • Wait a few seconds for the water to reach the control Chamber of the valve.
  • When you turn the adjustment bolt “5” Clockwise, the adjustment pressure value will increase, otherwise it will decrease when you turn it in the direction.
  • After adjusting the desired inlet pressure value, tighten the nut under the adjustment Bolt.
  • Check and clean the finger filter indicated by “2” according to the water quality. Do not do more than one filter cleaning in a few months unless the water is very dirty.
  • Drain the water in the actuator and pilot valves of the valves that are not used during the winter season.

 

  1. Quick Pressure Relief Pilot
  2. Mini Ball Valve
  3. Finger Filter
  4. Manometer
  5. Pressure Adjustment Bolt

FLANGED
Available Diameters
 mm 50 65 80 100 125 150 200 250
inch 2 2½ 3 4 5 6 8 10
Port
 Flanged
Material
 GG25 – GGG40
Body
 Globe
Transmission Pressure
 PN10 – PN16 – PN25

VICTAULIC
Available Diameters
 mm 50 65 80 100 150
inch 2 2½ 3 4 6

 
Port
 Victaulic
Material
 GG25 – GGG40
Body
 Globe
Transmission Pressure
 PN10 – PN16 – PN25

THREADED
Available Diameters
 mm 25 40 50 65 80×50 80
inch 1 1½ 2 2½ 3x2x3
Port
 Threaded
Material
 GG25 – GGG40
Body
 Globe
Transmission Pressure
 PN10 – PN16 – PN25

ANGELED
Available Diameters
 mm 50 80 100 150
inch 2 3 4 6
Port
 Flange – Threaded
Material
 GG25 – GGG40
Body
 Globe
Transmission Pressure
 PN10 – PN16 – PN25